Figure 4.

Bolus H₂O₂ increases PC-PLC activity. [³H]choline labeled cells were pretreated with 40 μM D609 for 30 min, and then were incubated with/without 50 μM H₂O₂ for an additional 15 min. [³H]phosphorylcholine was extracted and separated by TLC. The radioactivity was counted with a scintillation counter. n = 4, *P < 0.01.